Data source implementations provided by different vendors and projects.

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Question:
Data source implementations provided by different vendors and projects.

1. C3PO

2.Apache Commons DBCP

3. All of the mentioned

4.None of the mentioned

Posted Date:-2022-01-04 07:51:33

More MCQS Questions and answers

  1. Error code for The statement was aborted because it would have caused a duplicate key value in a unique or primary key constraint.
  2. In your DAO methods, you neither need to surround the code with a try/catch block nor declare throwing an exception in the method signature.
  3. It is better to implement the PreparedStatementCreator interface and other callback interfaces as inner classes if they are used within one method only.
  4. JdbcTemplate that takes advantage of Java 1.5 features such as autoboxing, generics, and variable-length arguments to simplify its usage.
  5. To access the database with JDBC:-
  6. When implementing the PreparedStatementCreator interface, you will get the database connection as the createPreparedStatement() method’s argument.
  7. Which concrete exception in the DataAccessException hierarchy should be thrown?
  8. A set of persistent annotations for you to define mapping metadata.
  9. An ORM framework persists your objects according to the mapping metadata you provide.
  10. Class which declares a number of overloaded update() template methods to control the overall update process.
  11. Class which represents a real-world entity and its instances will be persisted to a database.
  12. Data source implementations provided by different vendors and projects.
  13. Database Engine which uses low memory consumption and easy configuration.
  14. Each entity class to be persisted by an ORM framework, a default constructor with no argument is required.
  15. For testing purposes, the client/server mode is more appropriate.
  16. How does the Spring JDBC framework know that state 23505 should be mapped to DuplicateKeyException?
  17. If the identifier value is null, this entity will be treated as a new and unsaved entity.
  18. Implementations of the SqlParameterSource interface:-
  19. JDBC Properties for Connecting to the Application Database.
  20. JdbcTemplate require statement parameters to be passed as an object array.
  21. Method has a warning from the Java compiler because of an unchecked conversion from List to List.
  22. Method of RowMapper interface in which, you have to construct the object that represents a row and return it as the method’s return value.
  23. Method to retrieve the JDBC template.
  24. Method which provides list of maps.
  25. Mode which Derby prefers to run in:-
  26. Named parameters are supported only in SimpleJdbcTemplate.
  27. Named SQL parameters are specified by name (starting with a colon) rather than by position.
  28. ORM which isn’t supported by Spring:-
  29. PreparedStatementSetter, as its name indicates, create a PreparedStatement object on this connection the parameter as well as binding task of the overall update process.
  30. RowCallbackHandler purpose is to map a single row of the result set to a customized object.
  31. RowMapper implementation which can automatically map a row to a new instance of the specified class.
  32. SimpleJdbcTemplate offers a convenient batch update method in the form of:-
  33. SingleConnectionDataSource (a DriverManagerDataSource subclass). As its name indicates, this maintains only a single connection.
  34. Spring also provides several convenient but less powerful data source implementations.
  35. Spring JDBC framework offers a convenient class, to simplify your DAO implementation.
  36. Spring supports most of the popular ORM (or data mapper) frameworks.
  37. Standard interface defined by the JDBC specification that factories Connection instances.
  38. The direct parent class of DataAccessException is:-
  39. The general purpose of the Data Access Object (DAO) pattern is to avoid these logic related problems by separating data access logic from business logic and presentation logic.
  40. The JdbcTemplate class declares a number of overloaded query() template methods to control the overall query process.
  41. The JdbcTemplate class offers template method for batch update operations.
  42. The org.springframework.jdbc.core.support.JdbcDaoSupport class has a setDataSource() method and a setJdbcTemplate() method.
  43. The primary interface that allows you to process the current row of the result set
  44. The return type of the queryForObject() method will be determined by the class argument (e.g., String.class).
  45. The Spring framework offers a consistent data access exception-handling mechanism for its data access module.
  46. To allow the identifier to be null, you should choose a primitive wrapper type:-
  47. To start the Derby server in the client/server mode.
  48. To use SimpleJdbcTemplate:-
  49. Which DataSource is not stable in MultiThreaded Environment?
  50. You implement this interface to override the statement creation task.
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